 | | Re: is IR considered broken?
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(...) For all who are interested, I copied the source to: (URL) porting hints, e-mail me directly. -Kekoa (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: Help with 9738 LEGO Mindstorms Remote Control
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Thanks Dave. I hadn't downloaded the firmware yet. Originally, I was simply hoping to use the remote control and the rcx to drive my trains. So I didn't bother to install the software. Now I know. Again, Thank you. Ben In lugnet.robotics.rcx, Dave (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx)
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| | Re: is IR considered broken?
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Yes I would be interested in seeing the libRcx implementation of the IR functions. thanks, Mark (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | application termination
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Hi, what is the magic in LegOS to quit the application so that it can be restarted again? In some demos it works, but the same mechanism (i.e. 1 stopper process that kills the other on [run] button) quits the program, but the display says some (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: is IR considered broken?
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(...) I have working IR code, but it does not work with LegOS. It works with that "custom, as-yet-unreleased version of Librcx" I mention every so often. It probably wouldn't take much to port it to LegOS. Changes would be: - modify hook to get a (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: firmdl for Win32? (Re: random numbers)
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(...) I can compile it for use with Cygwin (Unix for NT), but since I have not (yet) figured out how to configure and use the serial port under NT, there is no NT version as of yet. But there are other firmware downloaders for NT already. To compile (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: random numbers
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(...) The firmware supports random numbers using some method that whose name I can't remember at the moment. Something about feedback. Anyways, the algorithm there boils down to: int seed; int rand (void) { char bit; bit = (seed & (1 << 1)) >> 1; (...) (25 years ago, 16-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: Light sensor initialization?
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(...) Partly, I can think of cases where that might be ugly. But more importantly, I often want to set up a scenario so that two robots will bump into each other in a certain place. (For making movies, showing off to friends, etc.) Can't do that as (...) (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) Huh? You mean, your robot doesn't work unless you point it in a certain direction before starting the program? That doesn't sound too robust. Okay, let's change the algorithm: (this is for a line tracker that follows "dark" lines and relies on (...) (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) going in a circle. (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) That's why I suggested a solution that works in all cases. It's not much harder than your solution either. (URL) Robert Munafo (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) This is my inspiration for adding on-the-fly init code, btw. RoboTag uses two seperate robots, and it turns out that my friend -- the source of the second mindstorms kit -- has a light sensor which reads about 10 "darker" than mine. (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) Wow. I feel I should point out that experimentally my method works 100% of the time. :) On the other hand, mine is a special-case application: the light sensor is used to read color values from a surface, which presumably will have very little (...) (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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Matthew's program takes one reading at initialization time to determine a baseline value. Any reading that falls 7 units below this is assumed to be a dark line. I take a somewhat more conservative approach, taking 10 readings over one second and (...) (25 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: random numbers
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(...) The author claims it has very good spectral properties, but I have no way of testing that. The only other reference I have found to it on the net is from a group at the University of Salzburg, who state that it performed well in their tests. (...) (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: random numbers
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(...) You could either take just the source file out of gnulibc and link it in, or you could change your setup to actually use the gnulibc (which is what I am doing, although not with legOS). (...) It depends on what you want the RNG for. If all you (...) (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: random numbers
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(...) Probably a dumb question, but how do I link in another copy of libc, besides the hacked-down one already present in legOS? I can't just copy the one on top of the other, and the linker should just link in the first it finds, correct? At any (...) (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos)
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| | firmdl for Win32? (Re: random numbers)
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(...) Hi, Luis Villa - author of HOWTO has some that he will soon include into the HOWTO. If you need just random 16 bit integer, you can use for example this random = 25173*previous + 13849; but I don't know how good it is; start with an arbitrary (...) (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos)
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| | Re: random numbers
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(...) gnulibc has a good LCGM you can just link in. John A. Tamplin Traveller Information Services jat@LiveOnTheNet.COM 2104 West Ferry Way 256/705-7007 - FAX 256/705-7100 Huntsville, AL 35801 (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos)
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| | LegOS HOWTO- updates
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For those of you who have looked at the LegOS HOWTO before, or for those who have not, there are some new topics covered, some of which may make you think twice about sticking to the old firmware. new topics: *random number generation. Don't make (...) (25 years ago, 14-Jul-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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